Vehicle control system with HSO-triggered output

Details Vehicle control system with HSO-triggered output Vehicle control system with HSO-triggered output

1988-04-21

1990-05-08

Shaw, Gareth D.

Boots, shoes, and leggings

36443105, 36443108, 3642224, 364925, 123480, 123417, F02P 900, F02D 4130

Patent

active

049243993

ABSTRACT:
The resistance to supply voltage, e.g. battery, fluctuation of an input/output circuit for a control system, e.g. vehicular ignition/fuel injection system, is improved by placing a comparator K in each analog input line, and using a voltage divider UD to compensate the reference voltage U.sub.R applied to one of the comparator inputs. Processing speed is increased by using digital comparators 22-26, which test not only for threshold value equal to counter state, but also for threshold value greater than counter state, in the duty-cycle modification circuit. Chip count is reduced and integration is increased by using a single voltage divider to supply all the input comparators and by using a High-Speed Output (HSO) port on the central processing unit (CPU) to perform multiple output tasks.

REFERENCES:
patent: 4013875 (1977-03-01), McGlynn
patent: 4214307 (1980-07-01), Peterson, Jr. et al.
patent: 4282574 (1981-08-01), Yoshida et al.
patent: 4307450 (1981-12-01), Carp et al.
patent: 4381447 (1983-04-01), Horvath et al.
patent: 4583189 (1986-04-01), Koyama
patent: 4800499 (1989-01-01), Ina et al.

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